#include <stdio.h>
#include <stdlib.h>

#define LIM 30

char * s_gets(char * st, int n);

int main(void)
{
    char number[LIM];
    char * end;
    long value;

    puts("Enter a number (empty line to quit):");

    while (s_gets(number, LIM) && number[0] != '\0')
    {
        value = strtol(number, &end, 10);
        printf("base 10 input, base 10 output: %ld, stopped at %s (%d)\n", value, end, *end);
        value = strtol(number, &end, 16);
        printf("base 16 input, base 10 output: %ld, stopped at %s (%d)\n", value, end, *end);

        puts("Enter a number (empty line to quit):");
    }
    puts("Bye!");

    return 0;
}

char * s_gets(char * st, int n)
{
    char * ret_val;
    int i;

    ret_val = fgets(st, n, stdin);

    if (ret_val)
    {
        while (st[i] != '\n' && st[i] != '\0')
            i++;
        if (st[i] == '\n')
            st[i] = '\0';
        else 
            while (getchar() != '\n')
                continue;
    }

    return ret_val;
}